This name is a synonym of Allium canadense var. lavandulare (Bates) Ownbey & Aase.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 274741) with original publication details: Field & Lab. 25: 32 1957.
This name was in version 1 of The Plant List, record kew-274741.